/**
 * Copyright 2011 Honeywell Federal Manufacturing & Technologies, LLC. This material was produced under U.S. Government
 * contract DE-ACO4-01AL66850, Honeywell Federal Manufacturing & Technologies, LLC, (FM&T) with the U. S. Department of
 * Energy for the operation of the Kansas City Plant . The U.S. Government has rights to use, reproduce, and distribute
 * this software.  NEITHER THE GOVERNMENT NOR Honeywell Federal Manufacturing & Technologies, LLC, MAKES ANY WARRANTY,
 * EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE.  If software is modified to produce
 * derivative works, such modified software should be clearly marked, so as not to confuse it with the version available
 * from FM&T.
 *
 * Additionally, this program is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License Version 3 published by the Free Software Foundation. Accordingly, this program is distributed in
 * the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this library.
 * If not, see http://www.gnu.org/licenses/.
 */
package org.braintrain.services.util.contentBaseVisitor;

import org.braintrain.domain.Content;
import org.braintrain.domain.ContentBase;
import org.braintrain.domain.Navigation;
import org.braintrain.domain.TestData;

/**
 * 
 * This ContentBase Visitor returns a ContentBase to the Delta user that
 * is ready to be edited.  In the case where there is only a released copy of the 
 * content in the navigation, a copy (see Copyable) is made of the ContentBase and
 * returned.  In the case where a delta copy exists, the delta copy is returned.
 * 
 * @author John Ericksen
 *
 */
public class ContentBaseVisitorEditExtractor implements ContentBaseVisitor {

    private ContentBase content;
    
    public ContentBaseVisitorEditExtractor(Navigation nav)
    {
        if(nav.getNullSafeContent().getDeltaValue() != null)
        {
            nav.getNullSafeContent().getDeltaValue().accept(this);
        }
        else
        {
            nav.getNullSafeContent().getValue().copy().accept(this);
        }
    }

    
    public void visit(TestData data) {
        setContent(data);

    }

    public void visit(Content content) {
        setContent(content);
    }


    public ContentBase getContent() {
        return content;
    }


    public void setContent(ContentBase content) {
        this.content = content;
    }
}
